Romero is a monkey altered with more intelligence than a usual monkey and was created by Dr. Thrill. He is found at the end of the Primate Intelligence Labs and instead of fighting him like a normal boss he instead gives you four riddles for you to "defeat" him. Getting a question wrong results in getting sent back to the beginning of the floor. After getting his four questions right he is surprised someone could solve his riddles and the player is given a choice between finishing him off or helping him. Choosing to spare him results in Romero summoning five Rolwoys and attacking you, while immediately attacking only results in three Rolwoys.